Wide input voltage range allows to use HQRP Adapter in 110 volts networks, e. g. in America, in Canada, in Mexico. And also, this adapter is a perfect for usage overseas in 220 volts networks! So no need to purchase a new adapter when you're traveling outside of the US, if you purchase this adapter! You can use it to go abroad without fear that the voltage will not be suitable for powering your device! Also compatible with iRobot Roomba Dirt Dog / Discovery / Discovery SE [Vacuum Cleaning Robot].